Work-supporting table



J. W. DRGLL.

WORK SUPPORTING TABLE.

APPLICATION FILED AUG.25|, 1919.

3 SHEETS-SHEET 1.

'aff- M@ M J. W, DROLL.

WORK SUPPORTING ABLE,

APPLICATION FILED AUG.25, I9I9. LST/298ml, Patented M3122@9 1921,

3 SHEETS-SHEET 2.

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J. W. DROLL.

WORK SUPPORTINGTABLE.

APPLICATION FILED IIuG.25, I9I9.

lPatmted Man 29, WZL

3 SHEETS-SHEET 3.

n. Ww MW titl PATENT @FFHClt JOSEFH W. DROLL, @1F QAKLAND, CALFORNIA.

WORK-SUQPPORTENG TABLE.

Specication of Letters Patent.

ATBatented Mar. 29, ,1921.

Application led August 25, 1919. Serial No. 320,637.

To all lwho/m. t may concern.:

Be it known that l, JOSEPH W. DRoLL, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented a certain new and useful Improvement in Work-Supporting Tables, of which the following is a specification.

My invention relates to improvementsin supporting tracks used in connection wlth machines traversing the sides of work supporting tables where such machines. are required to be held to a definite Worklng l1ne and refers particularly to a supporting track for carrying the machine around the corners of' the table, such as, for instance, 1s used in the mattress roll forming and stitching machine described in the Patent No. 1,300,140 issued to me on the 8th dayv of April, 1919, reference to which patent is hereby made l'for a description of the operation of said machine.

1n this type ot' machine the mattress roll forming and stitching machine is slidably mounted to move around the sides of the mattress supporting table, said table having rounded corners to conform to the rounded corners of the mattress upon which the roll is being formed.

The machine is necessarily so positioned relatively to the table and the mattress thereon that the roll forming and stitching mechanism will engage the corner of the mattress at a particular point which l term the working line. rllhis Working line must be strictly adhered to in order to provide a neat uniform roll, and especially While the machine is rounding the corners of the table.

The machine must be slidably supportedv and guided in such' a manner that what might be termed the center of said machine will be moved, regardless of the position of the front and rear ot' the machine, along the working line of the mattress.

The primary object ot this invention, then, to provide an improved Work supporting table for mattress roll forming and stitching machines and the like having improved means for retaining the working center ot the machine in coincidence with the working center of the mattress.

Another object of the invent-ion is to provide an improved work supporting table adapted to retain the Working center of a machine oi the type described in proper relative position to the Work while rounding rounded corners as well as along the straight sides Aof said table.

ll accomplish these and several other objects by means of the device disclosed in the drawings forming a part of the present specification, wherein like characters of reference are4 used to designate similar arts throughout the said specification and rawin s, and in which:

igu're 1 is a broken side elevation, partly in section, disclosing the machine, also partly broken away, slidably mounted upon one side of said table;

Fig. 2 is a right hand elevation of the machine disclosing a broken transverse sec- Y tional View ot' a. portion of the table;

Fig. 3 is a broken plan View of the table;

Fig. 4; is an enlarged detail view ot the corner portion of the sup-porting track of the table;

Fig. 5 is a sectional view taken on line 5-d5 of Fig. 4 in the direction indicated; an y Fig. 6 is a transverse section taken on line 6--6 of Fig. l in the direction indicated.

Referring to the drawings the numeral 1 is used to designate a work or mattress supporting table having a suitable top 2 and a vertically disposed Hangs 3 extending around the edges of said top 2. Around the sides ot the table 1 l have providedhorizontally disposed upper and lower rack bars 5 and 6 engaged by pinions 7 and 8 respectively mounted upon a vertically disposed shaft 9 rotatably mounted upon a roll forming and stitching machine, indicated in general by the numeral 10, and operated byl certain mechanism 11 to move the machine 10 intermittently around the table 1, said mechanism11 being described fully in a copending application, being no part of the present invention.

The machine is slidably mounted upon the sides of the-table 1 by means of casters 12 which are pivotally mounted upon the machine and ride upon or within a horizontally disposed track 14, said track comprising, preferably, an upwardly faced channel.

A. portion of the machine 1() comprises what l term a former 16 through whichproject ypacking needles 17 operated by suitable mechanism 19 to form a roll 20 upon the edge of the mattress 3, indicated in dotted lines in Fig. 2 of the drawings. Adjacent the packing needles 17 and very nearly Within the same plane is a sewing needle 18 opgeraet/e erated by suitable mechanism to sew a double lock-stitch through the formed roll to permanently retain the same.

The vertical imaginary plane between the packing needles 17 and sewing needle 18 is what l term the working center oi' the machine 10, and it is this working' center which must always be retained in the same position relatively to the roll 20 of the mattress 3 while the machine 1-0 is traveling around the round corners of the table top 2.

`While traversing the straight sides of the edges of the top 2 the machine 10 is automatically retained in its correct relative pou sition by means of two horizontally disposed guide rollers 21 and 22 arranged in different planes horizontally, one above the other, the purpose of which will hereinafter be more fully described, and bearing against one ofthe side or vertical flanges of the channel track 111.

Reference to Fig. 1 of the drawings will reveal that the plane of the packing needles 17 and sewing needle 18 is approximately midway between the rollers 21 and 22 so that theaction ot said rollers in bearing against the side of the channel track will tend to prevent movement of the casters 12 upon their pivotal points and thereby automatically retain the machine 10 in correct alinement while said machine is traveling along the straight sides of the table 1.

rl`he rounded corners of the table 1 are provided with corner tracks 23 consisting of arcuate members having two tracks superimposed one above as disclosed in Figs. 1, and 6 of the drawings. These double tracks are arranged at different elevations in order to Jprovide se arate tracks for each roller.

n Fig. 4e have prepared a diagrammatic view wherein the heavy dotted lines represents the work line on the mattress and also the path of the working center of the man chine 10. lt will be observe-d in this figure that the center of a straight line drawn between the centers of the rollers 21 and 22, represented in dotted lines, at which point the working plane of the packing and sewing needles 1s represented by a straight transverse broken line, coincides with or lies tangent to the heavy dotted line or the working line of the mattress.

Briefly, the foremost and upper roller 22 travels in a straight line to a point beyond Where the working line ot the mattress begins to turn, or until said working plane of the needles coincides vwith the vertical radius of the curvature of the track. Beyond this position the lforvv'ard roller 22 swings around the central curved portion of the track and inwardly toward the table 1 while the rearward roller 21 moving inthe lower track moves outwardly in the lower track thereby automatically maintaining the machine lO upon the working line ot' the mattress and tangent thereto at all points while traversing said curve. F rom this it is evident that the working plane of the needles, which is transversely arranged to the working line of the mattress and the roll 20, will always automatically be retained at right angles to said roll while 'traversing said curve, and the forward roller will continue to move inwardly toward the mattress while the rear roller 21 will continue to move, in cifect outwardly from said mattress until the working' plane ofthe needles, as represented by 'the transverse dotted or broken line coincides with the horizontal radius of the curve, at which point the front roller has reached the straight portion of the track let along the adjacent side ot the table 1 and the rear roller 21 will then be entering the st aight portion of the lower track which begins be-y tore the horizontal radius is reached.

ln other words the machine 10 is autou matically retained tangential to the curved working line while traversing the rounded corners of the table to engage the rounded corners of the mattress.

Having thus described my invention what l claim as new and desire to secure by Letters Patent is:

1. rlhe combination with a mattress supporting table having rounded corners to support a mattress having rounded corners, and a roll forming and stitching' machine slidably mounted to move around said table, of a track mounted upon the sides of said table, said track' being divided adjacent the corners to form double treads arranged at different elevations and rounded to conform to the round corners oi said table; and means mounted upon the machine to engage the double treads for retaining said n'n'ichine tangent to the rounded corners of a matu tress upon said table While traversing said rounded corners.

2. flhe` combination with a mattress supporting table having rounded corners to support a mattress having rounded corners, and a' roll forming and stitching machine slidably mounted to move around said table, of a track mounted upon the sides ot' said table and conforming with the rounded corners thereof; a tread -formed in the upper portion of the track adjacent the rounded corners having a curvature in advance or the curvature of the table corners; a tread formed in the lower portion of the track and having a. curvature' extending beyond the curvature of the table corners; and means mounted upon the machine to engage the double treads for retaining said machine tangent to the rounded corners of a mattress uponlsaid table while traversing said rounded corners.

3. The combination with a mattress supporting table having rounded corners to support a mattress having rounded corners All il and a roll forming and stitching machine slidably mounted to move around said table, of a track mounted upon the sides of said table; double treads forming Vrounded corners for said track, said treads being arranged at different elevations to form an upper tread having a curvature in advance or' the curvature of the table corners, and a lower tread having a curvature extending beyond the curvature of said table corners; means mounted at diiierent elevations on the machine to engage the double treads for retaining said machine tangent to the rounded corners of a mattress upon said table While traversing said rounded corners.

a. The combination with a mattress supporting table having rounded corners to support a mattress having rounded corners and a roll forming and stitching machine slidably` mounted to move around said table, of a track mounted upon the sides of said table;

double treads forming rounded corners Jtor said track, said treads being arranged at diiierent elevations to form an upper tread having a curvature in advance of the curvature of the table corners, and a lower tread having a curvature extending beyond the curvature of" said table corners; rollers mounted at diiierent elevations on the machine to engage the double treads for retaining said machine tangent to the rounded corners of a mattress upon said table While traversing said rounded corners.

ln Witness whereof l hereunto set my signature.

JSlEPl-li W. DRULL. 

